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ORIGINAL ARTICLE
Year : 2018  |  Volume : 25  |  Issue : 2  |  Page : 106-111

Location of femoral/tibial tunnels in anterior cruciate ligament reconstruction and their impact on graft integrity: Magnetic resonance imaging review


1 Department of Radiology, Burjeel Medical Centre, Muscat, Sultanate of Oman
2 Department of Medicine, Burjeel Medical Centre, Muscat, Sultanate of Oman

Correspondence Address:
Dr. Sushmita Keerthi Chilkuri
Department of Radiology, Burjeel Medical Centre, Aziba North, Muscat
Sultanate of Oman
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DOI: 10.4103/wajr.wajr_37_17

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Context: Despite advances in surgical techniques for anterior cruciate ligament(ACL) repair, a significant proportion of patients encounter persisting pain/instability of the knee postoperatively. Objectives: To assess the location of femoral/tibial tunnels on magnetic resonance imaging(MRI) and to correlate the findings with the ACL graft integrity/graft-related complications. Study Design/Settings: This was a cross-sectional study done at Burjeel Medical Centre, Muscat, Oman. Materials and Methods: The study period was between November 2015 and June 2017 on Philips Ingenia 1.5 Tesla MRI machine. Atotal of 30male patients, age ranged from 20 to 43years who presented with knee pain/instability 1year postreconstruction of ACL, were recruited for the study. Results: Of 30cases, 10(33.33%) patients had an intact graft on MRI. Of the remaining 20patients, graft impingement was noted in 15patients(50%), graft tear in 3cases(10%), and graft stretching with abnormal high T2 signal in the remaining 2cases(6.67%). Associated findings of focal arthrofibrosis in the anterior knee joint space and tibial tunnel cysts were encountered in few patients who were not dealt with in this study. Out of 20 patients with graft abnormality, femoral tunnel was abnormally located in 3 (15%), tibial tunnel was located anterior to the MRI equivalent of Blumensaat's extension line partly or completely in 16(80%) and both tunnels were normally located in 1(5%). Conclusion: The location of the femoral/tibial tunnels is the most important determinant factor of postoperative graft integrity in ACL reconstruction patients.


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